Current Electricty Flashcards
Current
The flow of electrons in a wire
Circuit
A continuous loop (usually metal) that is needed for electrons to flow in order for electricity to flow
Voltage
Potential difference : the amount of force with which the battery can push electrons
From which side does the battery push electrons
Negative side , around circuit, back to positive
Resistors
Slow down the flow of current, turns electrical energy into heat energy
Eg thin wire in a bulb
Series
All the current that flows through one bulb also has to flow through the other - a continuous loop.
If one bulb fails, the other won’t light
Parallel
The current flowing in the circuit is split between both bulbs. Eg headlights
How does current flow when drawing a circuit
From positive to negative , although it’s not acc like that
Conductors
Allow electricity to flow through themselves eg metal
Insulators
Do not allow electricity to flow through themselves
How to arrange a voltage circuit
In parallel with the component (bulb)
Ohm’s law equation
Triangle : Voltage on top
Current (|) and Resistance (R) on bottom
Ohm’s law
For a metallic conductor at constant temperature the current is directly proportional to the voltage
Diode
A device that allows current to flow in one direction only.
In a diode symbol, which side is the positive
The one with the triangle
